Direct positive type light-sensitive silver halide photographic

Details Direct positive type light-sensitive silver halide photographic Direct positive type light-sensitive silver halide photographic

1988-05-02

1989-09-05

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Using identified radiation sensitive composition in the...

430564, 430567, 430409, G03C 1485

Patent

active

048638382

ABSTRACT:
A direct positive photographic material having a support and a silver halide emulsion layer thereon contains internal latent image type silver halide grains. These grains have a core/shell structure and have not been previously fogged. Each grain comprises a conversion type silver halide core and a silver halide shell over the core.
The layer would produce, when exposed for a given time upto one second and developed at 20.degree. C. for 4 minutes with a certain internal developing solution, a maximum density which is at least five times that obtained when the layer is similarly exposed and developed with a particular surface developing solution.

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patent: 4070190 (1978-01-01), Friedrich et al.

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